who cares? they should get rid of the silly group and have them go back to voting in the individual states they are registered in
How do the Pubs do it? Can their party member living abroad vote in the primaries?
Yes, provided they're voting in a contest that allows absentee ballots to be cast. And I think that's true of the primary states but not the caucus states. E.g, if you're registered to vote in New Hampshire but living overseas, then you can cast an absentee ballot in the New Hampshire primary.